dutasteride is notoriously expensive wherever you look . Unlike finasteride you can't break it up as it comes in 0.5mg capsules . I'm in UK and get mine from Oxford Online Pharmacy which is legit . It's 21 pound per month coming in at under a pound per day . You have to pay £20 for a script though so it's roughly £80 for a 3 months supply. I've tried to get it cheaper from dodgy looking sites but it's expensive there too!
At least were in the UK though , in the US it's even less available I believe and you need a script from a doctor .